4除以25的竖式计算

当用电器两端所加电压超过用电器额定电压会不会把用电器烧坏? 请问是不是只要保证电器元件不超过额定电流,就不会被烧坏,电压再高也可以?举一个比较极端的例子,比如一个灯泡的额定电流是300mA,这时用一个电源为其提供电压,使之在250mA左右发光,但测 同为亚欧大陆,欧洲冰川作用强于非洲原因? we must rest from playing for a week or two weeks every year 翻译 欧洲面积约 冰川作用显著,主要表现有? 欧洲地形是不是都是冰川作用..有没有个例～像德国不是有很多条河流流经吗?为什么不是流水作用～ 哪个欧洲国家不是冰川作用形成的 Accomodation has been booked for N/A weeks from 27/01/2013 to N/A.求翻译 Last year,Wang Ming was away from school for more than four weeks.这句话什么意思. He is going to be away from Wuhan for two weeks.大家可发看一下这个地方,TO后面可不可是away from 它的选择的答案是a.be away from b.leave from c.be away d.leave其实我感觉leave也是可以的啊。你看一看啊。leave...fo 生物题这句话对吗,可用斐林试剂在沸水浴情况下检测糖链的存在 鉴定物质 使用试剂 条件 呈现颜色①蔗糖 斐林试剂 沸水浴 砖红色②尿糖 斐林试剂 沸水浴 哪个对老师说2对 1不对 为什么 尿糖是还原糖玛?蔗糖才是还原糖啊 请高手翻译：a day on the moon lasts for two weeks 山东省莱州市昌邑县陈家庄柳坛陈氏后人一代""宝"三代"义"五代"广"七代"连"九代"圣".二,四六八代是两字辈,中间无字,单名. They are made to work day and night.还是They are made work day and night. 在进行过滤操作时,除了使用铁架台(带铁圈)、烧杯、玻璃棒以外,还需要的仪器是如题 A.酒精灯 B.蒸发皿 C.漏斗 D.托盘天平 they had to work day and night. ____they____ ____work day and night?we should keep our rooms clean to fight the flu.____should we____to fight the flu?You should keep away from crowded places.You___ ___to the crowded places. 有什么鱼适合做鱼丸的?什么鱼的肉质可以做鱼丸?而且要比较好的鱼,价格方面本人自会去查,哪位可以告诉我哪些鱼好做,请留下鱼的名字,谢谢了 做鱼丸用什么鱼好 做鱼丸用什么鱼 做鱼丸最用什么鱼类?最好用什么鱼类 用什么鱼最好? What do you think their relationship? 乐扣玻璃杯能微波炉能转吗 G排为什么=F浮=p液gV排液'如上.我问你为什么等于,不是问意思 G=mg里G是什么意思,m,g是什么意思 为什么有机物用（CH2O)*表示2为小写,在H右下角 过滤常用的设备有哪些那个，不是实验室的过滤，是工业上用的过滤机器 community是什么意思,怎么读? Community outreach什么意思?One of the conditions for accepting the award was that each Fellowdevelop a ‘community outreach’ project to communicate some facet of the workaccomplished during their tenure.以上是原句,出自一篇人文地理 community resilience什么意思 福州鱼丸怎么做 鱼丸好吃吗